Forward operation structure of rotary disconnecting switch

Abstract

The utility model relates to a forward operation structure of a rotary disconnecting switch, which comprises a pair of conductive devices arranged side by side. The transmission gear is respectively meshed with the rotating shafts of the two conductive devices; the upper end of the rotating part is connected with the input shaft and rotates synchronously with the input shaft, the lower end of the rotating part is connected with the transmission gear, and a rotating idle stroke is arranged between the rotating part and the transmission gear; the rotating piece is connected with at least one energy storage mechanism in the rotating direction. When the rotating part drives the energy storage mechanism to store energy, the transmission gear can be kept in a static state, and the transmission gear is not driven, so that the rotating shaft and the moving contact in the conductive device can be kept in the opening and closing positions, and the conductive device is ensured to have the maximum opening distance.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage switch equipment, in particular to a forward operation structure of a rotary isolating switch. Background Art

[0002] The rotary disconnect switch is a switchgear designed for low-voltage DC applications. The rated voltage of this disconnect switch is 1500V DC and it can provide a current of 63A to 630A. It is specifically used for isolation protection in low-voltage DC environments.

[0003] The rotary disconnector includes multiple conductive devices and operating mechanisms. The conductive devices include a rotating shaft and a contact system. The contact system includes a static contact and a moving contact. The moving contact is connected to the rotating shaft and rotates synchronously. When the moving contact and the static contact are in the open state, the distance between the two is called the opening distance. The size of the opening distance determines the performance of the switch.

[0004] The operating mechanism is used to control the rotation of the rotating shaft to open and close the switch. The operating mechanism mainly includes a rotating part and a pair of energy storage mechanisms. In the past, the rotating part was directly connected to the rotating shaft of the conductive device. The rotation of the rotating part will directly drive the rotating shaft and moving contacts in the conductive device to move.

[0005] The operating mechanism is divided into forward operation and side operation according to its position relative to the conductive device. This patent application is mainly for the forward operation structure. The problems existing in the previous forward operation structure are:

[0006] 1. The disconnector's opening position is not fixed, posing a risk of premature contact erosion. Specifically, when the operating mechanism controls the conductive device to close the circuit breaker via a rotating member, the rotating member must first rotate and compress the energy storage mechanism to the dead point. During this rotational stroke, the rotating member directly drives the switch's moving contact toward the static contact, causing the opening distance to decrease. The energy storage mechanism will only begin to release energy after passing the dead point. Only during this energy release process can the moving contact quickly close with the static contact.

[0007] 2. There is a problem with the moving contact following the movement during operation. Specifically, in the past, the moving contact rotated directly and synchronously with the rotating part in the operating mechanism through the rotating shaft of the conductive device. When the rotating part was in the open position, the energy storage mechanism could not restrain the position of the rotating part. As a result, the operator could cause the moving contact in the switch to rotate at a small angle by twisting the rotating part by hand.

[0008] 3. The operating structure is unstable and the assembly is complicated. Utility Model Content

[0009] The technical problem to be solved by the utility model is: to overcome the shortcomings of the existing technology, to provide a positive operation structure of a rotary disconnector, and to solve the technical problem that the operating mechanism of the previous disconnector cannot lock the moving contact in the conductive device when it is in the open and closed position, resulting in too small an opening distance in the conductive device and causing the contact to be burned and damaged.

[0010] The technical solution adopted by the utility model to solve its technical problems is:

[0011] A rotary disconnect switch forward operation structure is provided, comprising:

[0012] A pair of conductive devices, the two conductive devices are arranged side by side, the conductive devices include a rotating shaft and a contact system, the rotating shaft drives the contact system to open and close;

[0013] A transmission gear, wherein the transmission gear is engaged with the rotating shafts of the two conductive devices respectively, so that the transmission gear drives the rotating shafts of the two conductive devices to rotate synchronously;

[0014] A rotating member, the upper end of which is connected to the input shaft and rotates synchronously with the input shaft, and the lower end of which is connected to the transmission gear, with a rotational idle motion being provided between the rotating member and the transmission gear, and the rotating member being adapted to drive the transmission gear to rotate; the rotating member is connected to at least one energy storage mechanism in the rotational direction;

[0015] When the rotating part rotates and drives the energy storage mechanism to reach the dead point position, the rotating part completes the rotational idle stroke and begins to abut the transmission gear. When the transmission gear drives the energy storage mechanism to cross the dead point position, the rotating part directly drives the two conductive devices through the transmission gear to perform opening and closing operations.

[0016] Furthermore, an end block is provided on the rotating shaft, and a row of arc-shaped external teeth is provided on the end block, and the end block is engaged with the transmission gear through the arc-shaped external teeth.

[0017] Furthermore, a shaft connection is formed between the rotating member and the transmission gear, so that the rotating member and the transmission gear are in rotational cooperation;

[0018] A pair of guide blocks and guide grooves are provided between the rotating member and the transmission gear. The guide grooves are opened on the transmission gear or the rotating member. The guide blocks are provided on the rotating member or the transmission gear. The guide blocks are located in the guide grooves. The rotation distance of the guide blocks in the guide grooves is the rotational idle stroke.

[0019] Furthermore, a torsion spring is provided between the rotating member and the transmission gear. When the rotating member performs energy storage rotation, the torsion spring applies a torsional force to the rotating member.

[0020] Furthermore, the number of the energy storage mechanisms is two;

[0021] Both sides of the rotating member abut against two energy storage mechanisms respectively.

[0022] The beneficial effects of the utility model are:

[0023] The forward operation structure of the rotary disconnector of the present invention is characterized in that two conductive devices are arranged side by side and then synchronously driven by a transmission gear in the middle. A rotational idle stroke is provided between the rotating member and the transmission gear. By utilizing the rotational idle stroke, the transmission gear can remain in a stationary state when the rotating member drives the energy storage mechanism to store energy. The transmission gear is not driven, which ensures that the rotating shaft and the moving contact in the conductive device can remain in the opening and closing positions, ensuring that the conductive device has a maximum opening distance.

[0024] The energy storage mechanism starts to release energy after passing the dead point position. During the energy release process, the moving contact is directly driven by the rotating parts, transmission gears, and rotating shafts to quickly rotate from the open position to the cooperative position, thereby improving the overall performance of the disconnector.

[0025] By providing a torsion spring between the transmission gear and the rotating member, the input shaft can be prevented from loosening when in the initial opening and closing position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the forward operation structure of the rotary disconnector of the utility model;

[0028] Figure 2 It is a schematic diagram of two conductive devices arranged side by side;

[0029] Figure 3 This is a schematic diagram of the forward operation structure of the rotary disconnector of the utility model in the open state;

[0030] Figure 4 This is a schematic diagram of the forward operation structure of the rotary disconnector of the utility model in the closed state;

[0031] Figure 5 It is a schematic diagram of the transmission gear;

[0032] Figure 6 is a schematic diagram of a rotating part;

[0033] Figure 7 It is a schematic diagram of the input shaft, rotating parts and transmission gears;

[0034] in,

[0035] 1. Conductive device, 11. Rotating shaft, 12. Moving contact, 13. Static contact, 14. Casing;

[0036] 2. Transmission gear, 21. Shaft hole, 22. Guide groove, 23. Torsion spring;

[0037] 3. Rotating member, 31. Mounting shaft, 32. Guide block, 33. Clamping block, 34. Abutment column;

[0038] 4. Input shaft;

[0039] 5. Energy storage mechanism, 6. End block, 61. External teeth;

[0040] 7. Shell. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0042] This application provides a forward-operating structure for a rotary disconnector, which is described in detail below. It should be noted that the order in which the following embodiments are described does not limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment below have their own specific focus. For details not provided in one embodiment, please refer to the relevant descriptions of other embodiments.

[0043] To address the technical problem in the prior art where the operating mechanism of a disconnector fails to lock the movable contact 12 within the conductive device 1 in the open or closed position, resulting in an excessively small opening distance within the conductive device 1 and contact erosion damage, one embodiment of the present application provides a forward-operating structure for a rotary disconnector. This is described in detail below.

[0044] like Figures 1 to 7 As shown, a forward operation structure of a rotary disconnect switch includes

[0045] A pair of conductive devices 1, the two conductive devices 1 are arranged side by side, the conductive device 1 includes a rotating shaft 11 and a contact system, the rotating shaft 11 drives the contact system 12 to open and close;

[0046] a transmission gear 2, wherein the transmission gear 2 is respectively engaged with the rotating shafts 11 of the two conductive devices 1, so that the transmission gear 2 drives the rotating shafts 11 of the two conductive devices 1 to rotate synchronously;

[0047] The rotating member 3 has its upper end connected to the input shaft 4 and rotates synchronously with the input shaft 4, and its lower end is connected to the transmission gear 2. A rotational idle motion is provided between the rotating member 3 and the transmission gear 2, and the rotating member 3 is suitable for driving the transmission gear 2 to rotate; the rotating member 3 is connected to at least one energy storage mechanism 5 in the rotation direction.

[0048] The conductive device 1 includes a housing 14, an arc extinguishing system, a pair of static contacts 13, a rotating shaft 11 and a moving contact 12; the arc extinguishing system and the static contact 13 are fixedly installed in the housing 14, the rotating shaft 11 is arranged to rotate in the housing 14, and the moving contact 12 is installed on the rotating shaft 11. The rotating shaft 11 drives the moving contact 12 to rotate back and forth between the open position and the closed position, so that the conductive device 1 can realize power on and off.

[0049] In the conductive device 1 , the movable contact 12 rotates by an angle of 90° between the open position and the closed position.

[0050] Specifically, as an optional implementation in this embodiment, Figure 3 and Figure 4 As shown, an end block 6 is provided on the rotating shaft 11 , and a row of arc-shaped external teeth 61 is provided on the end block 6 . The end block 6 is meshed with the transmission gear 2 through the arc-shaped external teeth 61 .

[0051] In this embodiment, the end block 6 is an arc-shaped member, an outer wall of which is provided with external teeth 61 , and the end block 6 and the rotating shaft 11 are an integral structure.

[0052] Specifically, as an optional implementation in this embodiment, Figure 5 、 Figure 6 and Figure 7 As shown, the rotating member 3 and the transmission gear 2 are connected to form a shaft connection so that the rotating member 3 and the transmission gear 2 can rotate together;

[0053] A pair of guide blocks 32 and guide grooves 22 are provided between the rotating member 3 and the transmission gear 2. The guide grooves 22 are provided on the transmission gear 2. The guide blocks 32 are provided on the rotating member 3. The guide blocks 32 are located in the guide grooves 22. The rotation distance of the guide blocks 32 in the guide grooves 22 is the rotational idle stroke.

[0054] Similarly, the guide groove 22 can also be provided on the rotating member 3 , and the guide block 32 is provided on the transmission gear 2 .

[0055] In this embodiment, a mounting shaft 31 is provided at the lower end of the rotating member 3, and a shaft hole 21 is provided in the middle of the transmission gear 2. The mounting shaft 31 is inserted into the shaft hole 21, so that the rotating member 3 and the transmission gear 2 form a rotational fit, and then a guide block 32 is provided on the rotating member 3 and the transmission gear 2, so that the rotating member 3 can drive the transmission gear 2 to rotate through the guide block 32 after completing the rotational idle stroke.

[0056] Specifically, as an optional implementation in this embodiment, Figure 5 As shown, a torsion spring 23 is provided between the rotating member 3 and the transmission gear 2 . When the rotating member 3 performs energy storage rotation, the torsion spring 23 applies a torsional force to the rotating member 3 .

[0057] If there is no torsion spring 23, the position of the rotating member 3 can only be constrained by the energy storage mechanism 5. However, the energy storage spring in the energy storage mechanism 5 is a large spring. When the rotating member 3 is in the open and closed positions, there is a certain movement gap between the rotating member 3 and the energy storage mechanism 5, which also gives the rotating member 3 a certain rotation space. The input shaft 4 is fixed on the rotating member 3, which also causes the input shaft 4 to rotate a certain small angle. In order to avoid this small-angle rotation, a torsion spring 23 is added. The torsion spring 23 can ensure that there is a certain torque between the rotating member 3 and the transmission gear 2, so that the rotating member 3 will not loosen in the open and closed positions.

[0058] Correspondingly, an annular groove is provided on the transmission gear 2 , and the torsion spring 23 is installed in the annular groove.

[0059] In this embodiment, the operating mechanism is provided with a housing, and the energy storage mechanism 5 , the rotating member 3 , the input shaft 4 , and the transmission gear 2 are all installed in the housing, and the housing is fixed on the two conductive devices 1 .

[0060] In order to facilitate the installation of various components into the housing, the housing is designed to be divided into an upper shell and a lower shell, and the upper shell and the lower shell are fastened and connected by bolts.

[0061] The transmission gear 2 is in rotational engagement with the lower housing, allowing it to rotate stably within the housing. The input shaft 4 passes through the upper housing and is in rotational engagement with the upper housing.

[0062] A square hole is provided at the upper end of the input shaft 4 , and the square hole cooperates with the handle to facilitate the operator to operate the input shaft 4 to rotate.

[0063] Specifically, as an optional implementation in this embodiment, Figure 3 and Figure 4 As shown, there are two energy storage mechanisms 5 ; two sides of the rotating member 3 abut against the two energy storage mechanisms 5 respectively.

[0064] The energy storage mechanism 5 includes an energy storage spring and two end seats. The energy storage spring abuts against the housing through one end seat and abuts against the rotating member 3 through the other end seat.

[0065] A pair of abutment posts 34 are provided on the rotating member 3 , and the abutment posts 34 are used to abut and cooperate with the end seats of the energy storage mechanism 5 .

[0066] In this embodiment, the input shaft 4 is clamped with the rotating member 3. Specifically, a pair of clamping grooves and clamping blocks 33 are provided between the input shaft 4 and the rotating member 3. The clamping grooves are provided on the input shaft 4, and the clamping blocks 33 are provided on the rotating member 3. The clamping blocks 33 and the clamping grooves between the input shaft 4 and the rotating member 3 are clamped, so that the input shaft 4 drives the rotating member 3 to rotate synchronously.

[0067] The working principle of the forward operation structure of the rotary isolating switch of the utility model:

[0068] By adding a transmission gear 2 between the rotating part 3 and the conductive device 1, and providing a rotational gap between the transmission gear 2 and the rotating part 3, after such a design, when the switch needs to switch from power-off to power-on, the rotating part 3 needs to rotate from the open position to the closed position. The rotating part 3 first drives the energy storage mechanism 5 to start storing energy. Before the energy storage mechanism 5 reaches the dead point, the guide block 32 of the rotating part 3 moves in the guide groove 22. When the energy storage mechanism 5 reaches the dead point, the guide block 32 abuts against the transmission gear 2, and then the energy storage mechanism 5 starts to release energy quickly after passing the dead point. During the energy release process, the energy storage mechanism 5 drives the moving contact 12 to quickly switch from the open position to the closed position through the rotating part 3, the transmission gear 2, and the rotating shaft 11. Even if the moving contact 12 contacts the static contact 13, the isolating switch is energized.

[0069] The process of switching the isolating switch from energizing to de-energizing is the same as the above principle, and the rotating member 3 can be rotated in the reverse direction.

[0070] The dead point position of the energy storage mechanism 5 means that when the rotating part 3 drives the energy storage mechanism 5 to store energy, the center of the rotating part 3 and the energy storage spring are in the same straight line, that is, the three-point-one-line state. At this time, the energy storage mechanism 5 is in the dead point position. As long as the rotating part 3 continues to rotate past the three-point-one-line position, the energy storage spring starts to release energy.

[0071] The forward operation structure of the rotary isolating switch of the present invention is simple and reliable. It only adds a transmission gear 2 between the rotating member 3 and the switch shaft 11. The structural change is minor and the operation is stable and reliable.

[0072] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0073] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0074] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0075] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0076] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0077] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0078] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A forward operating structure of a rotary disconnect switch, characterized in that: include A pair of conductive devices (1), the two conductive devices (1) are arranged side by side, the conductive devices (1) include a rotating shaft (11) and a contact system, and the rotating shaft (11) drives the contact (12) system to open and close; a transmission gear (2), wherein the transmission gear (2) is respectively engaged with the rotating shafts (11) of the two conductive devices (1), so that the transmission gear (2) drives the rotating shafts (11) of the two conductive devices (1) to rotate synchronously; A rotating member (3), the upper end of which is connected to the input shaft (4) and rotates synchronously with the input shaft (4), and the lower end of which is connected to the transmission gear (2), a rotational idle distance being provided between the rotating member (3) and the transmission gear (2), and the rotating member (3) being suitable for driving the transmission gear (2) to rotate; the rotating member (3) is connected to at least one energy storage mechanism (5) in the rotation direction; When the rotating member (3) rotates and drives the energy storage mechanism (5) to reach the dead point position, the rotating member (3) completes the rotational idle stroke and begins to abut against the transmission gear (2). When the transmission gear (2) drives the energy storage mechanism (5) to pass the dead point position, the rotating member (3) directly drives the two conductive devices (1) through the transmission gear (2) to perform opening and closing operations.

2. The forward operation structure of the rotary disconnector according to claim 1 is characterized in that: An end block (6) is provided on the rotating shaft (11), a row of arc-shaped external teeth (61) is provided on the end block (6), and the end block (6) is meshed with the transmission gear (2) via the arc-shaped external teeth (61).

3. The forward operation structure of the rotary disconnector according to claim 1 is characterized in that: The rotating member (3) and the transmission gear (2) are connected by a shaft so that the rotating member (3) and the transmission gear (2) can be rotated together; A pair of guide blocks (32) and a guide groove (22) are provided between the rotating member (3) and the transmission gear (2); the guide groove (22) is provided on the transmission gear (2) or the rotating member (3); the guide block (32) is provided on the rotating member (3) or the transmission gear (2); the guide block (32) is located in the guide groove (22); and the rotation distance of the guide block (32) in the guide groove (22) is the rotational idle stroke.

4. The forward operation structure of the rotary disconnector according to claim 3 is characterized in that: A torsion spring (23) is provided between the rotating member (3) and the transmission gear (2). When the rotating member (3) performs energy storage rotation, the torsion spring (23) applies a torsional force to the rotating member (3).

5. The forward operation structure of the rotary disconnector according to claim 3 is characterized in that: The number of the energy storage mechanisms (5) is two; Both sides of the rotating member (3) respectively abut against two energy storage mechanisms (5).

6. The forward operation structure of the rotary disconnector according to claim 3 is characterized in that: The input shaft (4) and the rotating member (3) are clamped together.

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